update readme. add node 16.x to test

.github/workflows/node.js.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 15.x]
+        node-version: [12.x, 14.x, 16.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:

README.md

@@ -10,7 +10,7 @@ esmock
   "type": "module",
   "scripts": {
     "test-ava": "ava --node-arguments=\"--loader=esmock\"",
-    "test-mocha": "mocha --loader=esmock"
+    "test-mocha": "mocha --loader=esmock --no-warnings"
   }
 }
 ```
@@ -43,11 +43,33 @@ test('should do global instance mocks —third parameter', async t => {
 
   t.is(getFile(), 'anywhere the instance uses fs readFileSync');
 });
+
+test('some mock definitions need a "default" namespace', async t => {
+  const { hello } = await esmock('../src/main.js', {}, {
+    '../src/hello.js' : {
+      default : {
+        world: () => 'world'
+      }
+    }
+  });
+
+  t.is(hello(), 'world');
+});
 ```
 
 
+### notes
+
+Use `--loader=esmock --no-warnings` to suppress node's warning messages.
+
+If your mock definition isn't appearing in tests, try nesting it inside a default definition.
+
+
 ### changelog
 
+ * 0.3.9 _May.05.2021_
+   * small change to README
+   * added a test, update gitlab action to use node 16.x
  * 0.3.8 _Apr.21.2021_
    * small change to README
  * 0.3.7 _Apr.20.2021_

package.json

@@ -1,6 +1,6 @@
 {
   "name": "esmock",
-  "version": "0.3.8",
+  "version": "0.3.9",
   "license": "MIT",
   "readmeFilename": "README.md",
   "description": "mock esm modules for unit-tests",

spec/esmock.spec.js

@@ -205,6 +205,16 @@ test('should mock an mjs file, again', async t => {
   t.is(main.verifyImportedMock(), 'second mocked');
 });
 
+test('should mock an exported constant values', async t => {
+  const main = await esmock('./local/usesmjsModule.js', {
+    './local/env.js' : {
+      TESTCONSTANT : 'hello world'
+    }
+  });
+
+  t.is(main.verifyImportedConstant(), 'hello world');
+});
+
 test('should mock core module', async t => {
   const usesCoreModule = await esmock('./local/usesCoreModule.js', {
     fs : {

spec/local/env.js

@@ -0,0 +1,2 @@
+
+export const TESTCONSTANT = 'TESTCONSTANTVALUE';

spec/local/usesmjsModule.js

@@ -1,5 +1,10 @@
 import scheduleFunction from './exampleMJS.mjs';
+import { TESTCONSTANT } from './env.js';
 
 export function verifyImportedMock () {
   return scheduleFunction();
 }
+
+export function verifyImportedConstant () {
+  return TESTCONSTANT;
+}